Which of the following organisms would you expect to find in an ecosystem that is in the initial stages of secondary succession?
roses
oak trees
crabgrass
bears
otters
question 25 (multiple choice worth 2 points)
which location would likely have the highest level of biodiversity?
a secluded lake that can only be reached by trail on an unpopulated island
a tropical rainforest that has been clear-cut to create highways and farmland
a polluted river that is now closed to motorized boats and is being cleaned up
a mountain top that can sustain only a few certain species of animals and plants
a corn field in the midwest that is planted only once every three to four years
question 26 (multiple choice worth 2 points)
which scenario would most likely result in genetic drift?
a botanist grafts together shoots from two different kinds of pea plants.
the grass growing in a field is regularly grazed by a herd of cattle.
loggers cut down all but a few spruce trees in a forest.
a gardener picks the prettiest roses from his garden to give to friends.
annual droughts periodically thin the population of cacti growing in a desert.